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                Spoj 11482. Count on a trie                </h1>
                <p>时间限制：6s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：256MB</p>			</div>
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                                <h3>题目描述</h3><p><p><span style="font-size: medium">Maintain two sets of strings S and T.Initially,each set contains an empty string with id 1.<br />
Your program are to perform the following four operations:</span></p>
<p><span style="font-size: medium">1.Add a char c to the end of an existed string Si in S,then insert the new string into S.Since there has been n strings in S already,the new string will hold the id n+1.<br />
2.Add a char c to the beginning or to the end of an existed string Ti in T,then insert the new string into T.<br />
3.Choose two existed strings Ti and Tj from T,next combine them into a new one TiTj,then insert the new string into T.<br />
4.Print the time that an existed string Ti in T appears in an string Si in S.Your program should print 0 if Ti is an empty string.&nbsp;</span></p>
<p><span style="font-size: medium">维护两个字符串集合S,T，一开始S和T都只有一个空串,编号都为1,要求支持操作:<br />
1.在S的某一个串Si后添加一个字符c，加入S<br />
2.在T的某一个串Ti的前面或后面添加一个字符c，加入T<br />
3.将T的两个串Ti,Tj首尾相接形成一个新串TiTj，加入T<br />
4.询问T中的某个串Ti在S中某个串Si中的出现次数.（如果Ti是空串，输出0）<br />
</span></p>
<p><span style="font-size: medium">&nbsp;</span></p></p><hr/><h3>输入格式</h3><p><p><span style="font-size: medium">In the first line,there is an integer Q,which means the number of operations to perform.<br />
In the next Q lines,the i-th line describes the i-th operation containing some integers.Such a line may look like this:<br />
1 Si c<br />
2 0 Ti c =&gt;add c to the beginning of Ti<br />
2 1 Ti c =&gt;add c to the end of Ti<br />
3 Ti Tj<br />
4 Ti Si</span></p>
<p><span style="font-size: medium">Q&lt;=300000,'a'&lt;=c&lt;='z'<br />
The number of the first operation will not exceed 100000.&nbsp;<br />
The number of the third operation will not exceed 30000.<br />
The number of fourth operation will not exceed 100000.&nbsp;&nbsp;&nbsp;</span></p></p><hr/><h3>输出格式</h3><p><p><span style="font-size: medium">For each &quot;4 Ti Si&quot; operation,print its result;</span></p></p><hr/><h3>样例输入</h3><pre>18
1 1 a
1 2 a
1 3 b
1 2 b
1 5 a
1 5 b
2 1 1 a
3 2 2
2 0 3 b
2 1 2 b
3 2 5
3 5 2
4 7 6
4 5 6
4 3 4
4 2 4
4 2 7
4 2 6

</pre><hr/><h3>样例输出</h3><pre>1
1
1
2
1
2</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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